How JWT Authentication Actually Works
What a JWT really is, why access and refresh tokens exist, and the security decisions that separate a toy auth system from a production one.
What a JWT really is, why access and refresh tokens exist, and the security decisions that separate a toy auth system from a production one.
How to give an LLM access to your own data — the anatomy of a RAG pipeline, from chunking and embeddings to retrieval and grounded generation.
Why you should never proxy file uploads through your server — and how S3 pre-signed URLs let clients upload directly, securely, and at scale.
The distributed-systems fundamentals that turn a slow API fast — caching, the N+1 trap, database indexing, background jobs, and idempotency.
You don't always need WebSockets. How Server-Sent Events give you live, one-way updates over plain HTTP — and when to reach for them.